123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295 |
- /** @file
- SMM Memory pool management functions.
- Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>
- Copyright (c) 2016 - 2021, Arm Limited. All rights reserved.<BR>
- SPDX-License-Identifier: BSD-2-Clause-Patent
- **/
- #include "StandaloneMmCore.h"
- LIST_ENTRY mMmPoolLists[MAX_POOL_INDEX];
- //
- // To cache the MMRAM base since when Loading modules At fixed address feature is enabled,
- // all module is assigned an offset relative the MMRAM base in build time.
- //
- GLOBAL_REMOVE_IF_UNREFERENCED EFI_PHYSICAL_ADDRESS gLoadModuleAtFixAddressMmramBase = 0;
- /**
- Called to initialize the memory service.
- @param MmramRangeCount Number of MMRAM Regions
- @param MmramRanges Pointer to MMRAM Descriptors
- **/
- VOID
- MmInitializeMemoryServices (
- IN UINTN MmramRangeCount,
- IN EFI_MMRAM_DESCRIPTOR *MmramRanges
- )
- {
- UINTN Index;
- //
- // Initialize Pool list
- //
- for (Index = sizeof (mMmPoolLists) / sizeof (*mMmPoolLists); Index > 0;) {
- InitializeListHead (&mMmPoolLists[--Index]);
- }
- //
- // Initialize free MMRAM regions
- //
- for (Index = 0; Index < MmramRangeCount; Index++) {
- //
- // BUGBUG: Add legacy MMRAM region is buggy.
- //
- if (MmramRanges[Index].CpuStart < BASE_1MB) {
- continue;
- }
- DEBUG ((
- DEBUG_INFO,
- "MmAddMemoryRegion %d : 0x%016lx - 0x%016lx\n",
- Index,
- MmramRanges[Index].CpuStart,
- MmramRanges[Index].PhysicalSize
- ));
- MmAddMemoryRegion (
- MmramRanges[Index].CpuStart,
- MmramRanges[Index].PhysicalSize,
- EfiConventionalMemory,
- MmramRanges[Index].RegionState
- );
- }
- }
- /**
- Internal Function. Allocate a pool by specified PoolIndex.
- @param PoolIndex Index which indicate the Pool size.
- @param FreePoolHdr The returned Free pool.
- @retval EFI_OUT_OF_RESOURCES Allocation failed.
- @retval EFI_SUCCESS Pool successfully allocated.
- **/
- EFI_STATUS
- InternalAllocPoolByIndex (
- IN UINTN PoolIndex,
- OUT FREE_POOL_HEADER **FreePoolHdr
- )
- {
- EFI_STATUS Status;
- FREE_POOL_HEADER *Hdr;
- EFI_PHYSICAL_ADDRESS Address;
- ASSERT (PoolIndex <= MAX_POOL_INDEX);
- Status = EFI_SUCCESS;
- Hdr = NULL;
- if (PoolIndex == MAX_POOL_INDEX) {
- Status = MmInternalAllocatePages (
- AllocateAnyPages,
- EfiRuntimeServicesData,
- EFI_SIZE_TO_PAGES (MAX_POOL_SIZE << 1),
- &Address
- );
- if (EFI_ERROR (Status)) {
- return EFI_OUT_OF_RESOURCES;
- }
- Hdr = (FREE_POOL_HEADER *)(UINTN)Address;
- } else if (!IsListEmpty (&mMmPoolLists[PoolIndex])) {
- Hdr = BASE_CR (GetFirstNode (&mMmPoolLists[PoolIndex]), FREE_POOL_HEADER, Link);
- RemoveEntryList (&Hdr->Link);
- } else {
- Status = InternalAllocPoolByIndex (PoolIndex + 1, &Hdr);
- if (!EFI_ERROR (Status)) {
- Hdr->Header.Size >>= 1;
- Hdr->Header.Available = TRUE;
- InsertHeadList (&mMmPoolLists[PoolIndex], &Hdr->Link);
- Hdr = (FREE_POOL_HEADER *)((UINT8 *)Hdr + Hdr->Header.Size);
- }
- }
- if (!EFI_ERROR (Status)) {
- Hdr->Header.Size = MIN_POOL_SIZE << PoolIndex;
- Hdr->Header.Available = FALSE;
- }
- *FreePoolHdr = Hdr;
- return Status;
- }
- /**
- Internal Function. Free a pool by specified PoolIndex.
- @param FreePoolHdr The pool to free.
- @retval EFI_SUCCESS Pool successfully freed.
- **/
- EFI_STATUS
- InternalFreePoolByIndex (
- IN FREE_POOL_HEADER *FreePoolHdr
- )
- {
- UINTN PoolIndex;
- ASSERT ((FreePoolHdr->Header.Size & (FreePoolHdr->Header.Size - 1)) == 0);
- ASSERT (((UINTN)FreePoolHdr & (FreePoolHdr->Header.Size - 1)) == 0);
- ASSERT (FreePoolHdr->Header.Size >= MIN_POOL_SIZE);
- PoolIndex = (UINTN)(HighBitSet32 ((UINT32)FreePoolHdr->Header.Size) - MIN_POOL_SHIFT);
- FreePoolHdr->Header.Available = TRUE;
- ASSERT (PoolIndex < MAX_POOL_INDEX);
- InsertHeadList (&mMmPoolLists[PoolIndex], &FreePoolHdr->Link);
- return EFI_SUCCESS;
- }
- /**
- Allocate pool of a particular type.
- @param PoolType Type of pool to allocate.
- @param Size The amount of pool to allocate.
- @param Buffer The address to return a pointer to the allocated
- pool.
- @retval EFI_INVALID_PARAMETER PoolType not valid.
- @retval EFI_OUT_OF_RESOURCES Size exceeds max pool size or allocation failed.
- @retval EFI_SUCCESS Pool successfully allocated.
- **/
- EFI_STATUS
- EFIAPI
- MmInternalAllocatePool (
- IN EFI_MEMORY_TYPE PoolType,
- IN UINTN Size,
- OUT VOID **Buffer
- )
- {
- POOL_HEADER *PoolHdr;
- FREE_POOL_HEADER *FreePoolHdr;
- EFI_STATUS Status;
- EFI_PHYSICAL_ADDRESS Address;
- UINTN PoolIndex;
- if ((PoolType != EfiRuntimeServicesCode) &&
- (PoolType != EfiRuntimeServicesData))
- {
- return EFI_INVALID_PARAMETER;
- }
- Size += sizeof (*PoolHdr);
- if (Size > MAX_POOL_SIZE) {
- Size = EFI_SIZE_TO_PAGES (Size);
- Status = MmInternalAllocatePages (AllocateAnyPages, PoolType, Size, &Address);
- if (EFI_ERROR (Status)) {
- return Status;
- }
- PoolHdr = (POOL_HEADER *)(UINTN)Address;
- PoolHdr->Size = EFI_PAGES_TO_SIZE (Size);
- PoolHdr->Available = FALSE;
- *Buffer = PoolHdr + 1;
- return Status;
- }
- Size = (Size + MIN_POOL_SIZE - 1) >> MIN_POOL_SHIFT;
- PoolIndex = (UINTN)HighBitSet32 ((UINT32)Size);
- if ((Size & (Size - 1)) != 0) {
- PoolIndex++;
- }
- Status = InternalAllocPoolByIndex (PoolIndex, &FreePoolHdr);
- if (!EFI_ERROR (Status)) {
- *Buffer = &FreePoolHdr->Header + 1;
- }
- return Status;
- }
- /**
- Allocate pool of a particular type.
- @param PoolType Type of pool to allocate.
- @param Size The amount of pool to allocate.
- @param Buffer The address to return a pointer to the allocated
- pool.
- @retval EFI_INVALID_PARAMETER PoolType not valid.
- @retval EFI_OUT_OF_RESOURCES Size exceeds max pool size or allocation failed.
- @retval EFI_SUCCESS Pool successfully allocated.
- **/
- EFI_STATUS
- EFIAPI
- MmAllocatePool (
- IN EFI_MEMORY_TYPE PoolType,
- IN UINTN Size,
- OUT VOID **Buffer
- )
- {
- EFI_STATUS Status;
- Status = MmInternalAllocatePool (PoolType, Size, Buffer);
- return Status;
- }
- /**
- Frees pool.
- @param Buffer The allocated pool entry to free.
- @retval EFI_INVALID_PARAMETER Buffer is not a valid value.
- @retval EFI_SUCCESS Pool successfully freed.
- **/
- EFI_STATUS
- EFIAPI
- MmInternalFreePool (
- IN VOID *Buffer
- )
- {
- FREE_POOL_HEADER *FreePoolHdr;
- if (Buffer == NULL) {
- return EFI_INVALID_PARAMETER;
- }
- FreePoolHdr = (FREE_POOL_HEADER *)((POOL_HEADER *)Buffer - 1);
- ASSERT (!FreePoolHdr->Header.Available);
- if (FreePoolHdr->Header.Size > MAX_POOL_SIZE) {
- ASSERT (((UINTN)FreePoolHdr & EFI_PAGE_MASK) == 0);
- ASSERT ((FreePoolHdr->Header.Size & EFI_PAGE_MASK) == 0);
- return MmInternalFreePages (
- (EFI_PHYSICAL_ADDRESS)(UINTN)FreePoolHdr,
- EFI_SIZE_TO_PAGES (FreePoolHdr->Header.Size)
- );
- }
- return InternalFreePoolByIndex (FreePoolHdr);
- }
- /**
- Frees pool.
- @param Buffer The allocated pool entry to free.
- @retval EFI_INVALID_PARAMETER Buffer is not a valid value.
- @retval EFI_SUCCESS Pool successfully freed.
- **/
- EFI_STATUS
- EFIAPI
- MmFreePool (
- IN VOID *Buffer
- )
- {
- EFI_STATUS Status;
- Status = MmInternalFreePool (Buffer);
- return Status;
- }
|